How can a custom error handler in PHP be implemented to provide informative error messages during development without disrupting the entire application?

When developing a PHP application, it is important to have a custom error handler in place to provide informative error messages without disrupting the entire application. This can be achieved by defining a custom error handling function that logs errors and displays them in a user-friendly format during development. By setting this custom error handler using the `set_error_handler()` function, developers can easily identify and troubleshoot issues in their code. 

// Custom error handler function
function customErrorHandler($errno, $errstr, $errfile, $errline) {
    echo "<b>Error:</b> [$errno] $errstr<br>";
    echo "Error on line $errline in $errfile<br>";
}

// Set custom error handler
set_error_handler("customErrorHandler");

// Trigger an error for testing
echo $undefinedVariable;

Keywords

custom error handler PHP informative error messages development application

Related Questions